Search found 128 matches

by Squonk42
Mon Nov 13, 2017 5:47 am
Forum: Postbag
Topic: LoRa modules (AI Thinker Ra-01, SX1278)
Replies: 16
Views: 328

Re: LoRa modules (AI Thinker Ra-01, SX1278)

Edit. I have now looked at the datasheets for the Semtech SX127x and the HopeRF95x and the Hope datasheet register map looks like its a complete rip off of the Semtech datasheet, with some minor changes to some of the descriptions, where they have edited the text for SX1276/77/78/79 and replaced it...
by Squonk42
Sat Nov 04, 2017 7:57 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 321
Views: 4732

Re: F405 & F411 versions of the BluePill

I usually buy them from Mouser , but they are also available at other online distributors . that's great, but i'm from europe ^^' buying from the likes of mouser/digikey/... is pretty expensive in shipping fees for me ^^' Me too :P but after looking i actually found 1 aliexpress seller selling it a...
by Squonk42
Fri Nov 03, 2017 9:41 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 321
Views: 4732

Re: F405 & F411 versions of the BluePill

Perhaps the best solution with the components is to initially supply them to the manufacturer However I am not sure on the setup for the pick and place machines. Probably best to speak to a company who already manufactures a similar board. Robot Dyn have replied to 2 of my emails about their Black ...
by Squonk42
Fri Nov 03, 2017 9:26 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 321
Views: 4732

Re: F405 & F411 versions of the BluePill

btw, concerning the buttons Squonk, i like the small buttons you linked... but can't find them anywhere on aliexpress or ebay (okay, i could find them from 1 seller at a ridiculously high price more than 1€ a piece) Can we maybe find some buttons that are small enough and that can easily be sourced...
by Squonk42
Fri Nov 03, 2017 3:58 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 321
Views: 4732

Re: F405 & F411 versions of the BluePill

Resourcing for the needed component should be the problem of the producing factory(ies), normally they should know where to buy :mrgreen: Yes, but defining exactly what to buy is the designer's problem :mrgreen: And to get the cheapest solution, you need to compare different sources! When I must re...
by Squonk42
Thu Nov 02, 2017 3:20 pm
Forum: STM32F103 Boards
Topic: The "PinkPill" board - the Reference Design
Replies: 7
Views: 371

Re: The "PinkPill" board - the Reference Design

Given that the LQFP468 STM32F103C8T6 and the LQFP64 STM32R8T6 are at the same price on TaoBao (~7.50 RMB, shipping within China included), and provided we take care of the STM32F103/STM32F405 compatibility (basically for F103, add USB-pull-up and replace VCAPs by 0R shunts), don't you think we shoul...
by Squonk42
Wed Nov 01, 2017 8:21 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 321
Views: 4732

Re: F405 & F411 versions of the BluePill

OK, no problem, let us keep them!
by Squonk42
Wed Nov 01, 2017 6:29 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 321
Views: 4732

Re: F405 & F411 versions of the BluePill

Re: PCB overhang Do we need to keep the PCB overhang on the outside of the header rows? On one hand, it is convenient to silkscreen to pin name, but OTOH, it makes the board wider by 2 pins on a breadboard... Re: VBUS valid sensing for HNP SRP In the STM32F4 Reference Manual RM0090 , page 1254, sect...
by Squonk42
Wed Nov 01, 2017 10:40 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 321
Views: 4732

Re: F405 & F411 versions of the BluePill

Concerning the dual supply: if we don't go for a dual supply, can someone draw me a schematic of what we would replace it by? See my post above : a simple PI filter with 1µF cap, 470R ferrite bead and 100nF close to the AVDD pin: http://www.stm32duino.com/download/file.php?id=2201 http://www.stm32d...